CN1048957A - The electromagnetic monophase actuator of miniaturization - Google Patents
The electromagnetic monophase actuator of miniaturization Download PDFInfo
- Publication number
- CN1048957A CN1048957A CN90106663.XA CN90106663A CN1048957A CN 1048957 A CN1048957 A CN 1048957A CN 90106663 A CN90106663 A CN 90106663A CN 1048957 A CN1048957 A CN 1048957A
- Authority
- CN
- China
- Prior art keywords
- magnetic circuit
- rotor
- magnetic
- electromagnetic
- actuator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
- H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
- H02K37/12—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
- H02K37/125—Magnet axially facing armature
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
- H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
- H02K37/12—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Windings For Motors And Generators (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The present invention relates to an electromagnetic monophase actuator, it comprise have the alter polarity of being divided into, the rotor of cylindrical magnetization parts (5) of the 2N of a cross magnetization magnetic pole.This device also comprises a stator structure that is made of first magnetic circuit (2) and second magnetic circuit (3), and two magnetic circuits couple together individually with non magnetic connector.It is applied as miniaturization drive unit accurate and that instrument is used.
Description
The present invention relates to a kind of electromagnetic monophase actuator, it comprises a rotor that places a stator structure air gap, and this stator structure is made of first magnetic circuit and second magnetic circuit that comprise the 2N utmost point and at least one magnetizing coil.These magnetic circuits are that the material by high magnetic permeability makes.Rotor is the thin type parts of thin magnetic pole being made of the 2N of opposite polarity, cross magnetization.Magnetization is very uniformly and the length Y that determines along motion path
AStretch.Such electromagnetic actuator device is particularly useful for rotary-type actuator or is used for the indication of instrument board.The characteristic of this class drive unit is to have the constant zone of big power.Thus, this drive unit can realize that very high reappearance reaches the accuracy of very high servo angle.Yet this drive unit its shortcoming in application is that its miniaturization is difficult to accomplish.In fact, according to the guidance of prior art, the zone of constant force is non-existent.First magnetic circuit and the second magnetic circuit utilization place a magnet assembly of outside, motion path to couple together for this reason.This magnet assembly that connects magnetic circuit must have enough sizes, so that form the path of magnetic flux, and has formed disadvantageous added size thus.
The objective of the invention is to realize a kind of electromagnetic monophase actuator, it has the reappearance same as described above and the quality of angular accuracy, and its size has reduced.
The invention is characterized in that two magnetic circuits connect separately with non magnetic connector, and N is less than (π D)/(8E), wherein E is the width of air gap in two magnetic circuits, and D is the average diameter of stator structure.Under this condition, the applicant is beyond thought all to instruct for prior art, and is that opposite mode can realize that a kind of its inside has the electromagnetic actuator device in a constant force zone.
According to first kind of form of implementation, this drive unit comprises the tubular rotor of a diametrical magnetization, and it has the utmost point of 2N to alter polarity, and the ratio between the length Y of the width of air gap E and the described utmost point should be less than 0.25.Stator structure is made up of the first such magnetic circuit and second magnetic circuit: first magnetic circuit is round rotor and 2N is arranged to by the excitatory magnetic pole of electric coil, second magnetic circuit is made of a solid cylinder at internal rotor, rotor and two magnetic circuits are coaxial, by select highly low-down cylinder can make as thin as a wafer indicating device or very little actuator.
According to a favourable modification, rotor magnetic pole pair is to be mutually related with magnetic circuit.Second magnetic circuit also constitutes a supporter of comparatively fragile rotor, and can support the employed axle of this drive unit.
According to another form of implementation, rotor makes a thin disk, and it is divided into the fan section of 2N alter polarity, cross magnetization, and rotor can rotate by the spaced winding central shaft in first magnetic circuit and second magnetic circuit.Its first magnetic circuit is to be made of the 2N that is wound with a magnetizing coil fan section, and second magnetic circuit that constituted by disk of these fan sections with rotor coaxial around.
The width of second magnetic circuit preferably equals 0.4 * (B O)/(Bsat) * (D at least
2-d
2)/(Dstat), BO is a magnetic flux density in the formula, and Bsat is the saturation induction density of iron core, and D is the external diameter of magnet magnetized spot, and d is the internal diameter that is arranged in the magnetized spot of air gap, and Dstat represents the external diameter of second magnetic circuit, it may be greater than D.Second magnetic circuit of Shi Shiing can make magnetic flux have maximum path like this, and the constant zone of power has also enlarged as much as possible.
According to a specific form of implementation, second magnetic circuit is to be close to epitrochanterianly, also can make firmer unitary rotor-second magnetic circuit, can ad hoc be used for the indicating device as instrument board.
According to a specific form of implementation of the present invention, have at least a magnetic circuit to be provided with chamfering or hypotenuse along the limit of at least one utmost point.This hypotenuse is interpreted as: be under the performance that makes by a disk at rotor, and the angle between the limit of at least one utmost point spare and a corresponding radial alignment form 0 ° and 10 °; And under the performance of column type rotor, the angle between the limit of at least one utmost point spare and the secant of column structure form 0 ° and 10 °.
In a specific form of implementation, when electric current causes that rotor is on limit of its magnetized spot and chamfering or the interactional position of hypotenuse, the locking action of rotor in the time of can suppressing to lack electric current.Chamfering preferably with 30 ° and 60 ° of rotor plane formation between angle.The width of chamfering be preferably the magnetic pole length of run 1/5 and 1/20 between.
According to a specific form of implementation, the servo coil that a magnetic pole of stator structure is sent out servosignal round.
The present invention will sharpen understanding by the description below in conjunction with accompanying drawing, and its accompanying drawing is:
Fig. 1: the profile of a rotary driving gear;
Fig. 2: profile in the middle of first magnetic circuit of above-mentioned rotary driving gear;
Fig. 3 a: profile of second form of implementation;
Fig. 4: with respect to the profile of first magnetic circuit of this second form of implementation;
Fig. 5 to 9: the different modification of the coil of rotary driving gear shown in Figure 4.
Drive unit shown in Fig. 1 comprises a cylindrical rotor (1) and a stator structure of being made up of one first magnetic circuit (2) and one second magnetic circuit (3).Rotor (1) is made of a rigid wheel sheet (4) of having fixed cylindrical thin magnet thereon.These thin magnets are utmost point spare six alter polarities, cross magnetization.Rotor (1) is installed on the axle (6) that is guided by an axle sleeve (7), and this axle sleeve for example is a ball axle sleeve.First magnetic circuit (2) is to be struck out basin-shaped components and constituted by high-permeability material.First magnetic circuit has six utmost point parts.Electric coil (8) is placed on the magnetic pole of first magnetic circuit and places outward.Second magnetic circuit (3) is to be made of the disk that high-permeability material makes, and has formed an air gap (9) between it and first magnetic circuit (2), and magnetic cylinder (5) is moved in this air gap.
Fig. 2 is the cutaway view of first magnetic circuit, and 6 magnetic poles (10 to 15) and coil (8,16,17) thereof are arranged on it as can be seen, and coil (8 and 16) is a magnetizing coil, and coil (17) is a servo coil of supplying with an electronic circuit signal of telecommunication.Magnetic pole (11) has the seamed edge (18,19) of two side chamferings.As shown in fig. 1, first magnetic circuit (2) and second magnetic circuit (3) are not linked together by magnet assembly, but connect by a non magnetic connector (20).
In the form of implementation of Fig. 3, rotor is made up of annular magnetization parts (21), it be installed in one with nonmagnetic rigidity core wheel (22) that spool (23) are connected on.This ring magnet (21) be divided into two opposite polarity, the utmost point of cross magnetization.The outer diameter D of this magnetic pole and inner diameter d thereof are consistent with the magnetizing part that is placed on air gap (9) inside.Stator structure is made up of first magnetic circuit (2) and second magnetic circuit (3).First magnetic circuit (2) is made of a cylinder, is furnished with the groove that can make magnetizing coil (8) formation path on it and forms opposed two half cylindrical structure.Second magnetic circuit (3) is made of a solid cylinder, it is by according to a cylinder with respect to opposed two the semicylinder structural configuration of groove of coil (8) path, it is one and avoids making magnet (21) to go up the unbalanced workpiece of power that occurs, these two magnetic circuits (2,3) are connected individually by the shell body of a nonmagnetic substance (24).
Fig. 4 represents the middle profile of first magnetic circuit.As can be seen, first utmost point parts (25) and second symmetrical with it utmost point parts (26) that constitute by a cylindrical sector.Coil (8) is placed round first utmost point parts (25), goes up at the utmost point (26) with second coil (27) of first coil (8) symmetry to form and the opposite polarity of first utmost point (25).Each utmost point parts (25,26) has separately the side (28,29) that tilts, when the junction point of two utmost point parts of magnetizing part (21) when having decline power regional, the power of locked rotor can be regulated in the limit of these inclinations.
In the represented coil form of Fig. 5, coil (8,27) is in the horizontal plane, and is placed on the periphery of magnetic circuit (25,26) separately.This coil is along the working portion (30) by the very near arc extension of magnetic circuit (25).Straight line portion (31) is connected with two ends of this working portion (30).This straight line portion (31) that forms coil extends to axle (23) side from two ends.If the sector angle of magnetic circuit (25,26) extends very greatly, if when the diameter of axle (23) is obtained the form of implementation that Fig. 5 is represented and can not be implemented in other words, then coil can be according to implementing as Fig. 6 or form of implementation shown in Figure 7.In Fig. 6, two ends of coil working part (30) are walked around in axle (23) outside with one, and obviously are circular-arc part (31) connection.In the embodiment shown in fig. 7, coupling part (31) from outer peripheral around axle (23).
According to another form of implementation shown in Fig. 8, coil is not to be placed on the magnetic circuit mid-plane, and is mounted on its transversal plane, coil (8) has passed (2) two utmost points (25 of magnetic circuit, 26) gap portion between, and alternately is from its end arrival axle (23) side, as shown in Figure 9.Obviously, the embodiment of these coils is only with the example formal description, and any restrictive form of implementation that can not solve as the technology that can consider.
The present invention is not limited in that aforementioned form of implementation determines any in form, and covered all possible modification on the contrary.
Claims (11)
1, electromagnetic monophase actuator, it comprises a rotor that is placed in the stator structure air gap, stator structure is existed by first magnetic circuit (2) that comprises 2N the utmost point and at least one magnetizing coil (3) and second magnetic circuit (3) structure, described magnetic circuit (2,3) be that material by high magnetic permeability makes, rotor is alter polarity, magnetized 2N magnetization thin type parts (5) to forming extremely laterally, and magnetization is very uniform, and the length Y that determines along motion path
AStretch, it is characterized in that: first magnetic circuit (2) utilizes non magnetic connector to be connected separately with second magnetic circuit (3); And wherein N is less than (π D)/(8E), and E is the width of air gap of determining in the middle of two magnetic circuits, and D is the average diameter of stator structure.
2, according to the electromagnetic monophase actuator of claim 1, it is characterized in that: it comprises the tubular rotor (5) of a diametrical magnetization, the pole pair that 2N alter polarity arranged on this rotor, the ratio of the length Y of the width of air gap E of described magnetic pole and the described magnetic pole determined on rotor circumference should be less than 0.25; And stator structure is to be made of such first magnetic circuit (2) and second magnetic circuit (3): first magnetic circuit is round rotor and have 2N by electric coil (8,16) excitatory utmost point spare (10 to 15), second magnetic circuit is made of a solid cylinder at internal rotor, and rotor and two magnetic circuits all are coaxial.
3, according to the electromagnetic monophase actuator of claim 2, it is characterized in that: rotor magnetic pole pair is to be mutually related with second magnetic circuit.
4, according to the electromagnetic monophase actuator of claim 1, it is characterized in that: rotor by one be divided into 2N alter polarity, laterally the thin disk (9) in magnetized fan section constitutes, described rotor moves in first magnetic circuit (2) and second magnetic circuit (3), its first magnetic circuit is 2N fan section (25,26) constitute, wherein at least some fan sections by magnetizing coil (8) round, and second magnetic circuit (3) and rotor coaxial.
5, according to the electromagnetic monophase actuator of claim 4, it is characterized in that: the width of second magnetic circuit equals at least:
(B O)/(Bsat) × (D2-d2)/(Dstat) ×0.4
Wherein BO is a magnetic flux density, and Bsat is the saturation induction density of iron core, and D is the external diameter of magnet magnetized spot, and d is the internal diameter that is arranged in the magnetized spot of air gap, and Dstat is the external diameter of second magnetic circuit, and it may be greater than D.
6, according to the electromagnetic monophase actuator of arbitrary claim in claim 4 or 5, it is characterized in that: second magnetic circuit (3) is interrelated with rotor (21).
7, according to the electromagnetic monophase actuator of arbitrary claim in the aforesaid right requirement, it is characterized in that: have at least a magnetic circuit on its at least one utmost point limit, a chamfering being arranged, or a hypotenuse.
8, according to the electromagnetic monophase actuator of claim 7, it is characterized in that: the angle that each fan section of first magnetic circuit has at least a longitudinal edge to have and rotor plane forms is 30 ° of chamferings that cause between 60 °.
9, the electromagnetic monophase actuator that requires according to aforesaid right.It is characterized in that: the width of its chamfering the magnetic pole length of run 1/5 and 1/20 between.
10, require according to aforesaid right in the single-phase electromagnetic transmission device of arbitrary claim, it is characterized in that: N is greater than having at least a magnetic circuit also to comprise the servo coil (27) that a magnetic flux of not flowing through electric current and not produced by other coil current influences in 1, two magnetic circuit.
11, according to the electromagnetic monophase actuator of any claim in the claim 1 to 10, it is characterized in that: one in the magnetic cell has a servo coil.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR89/08052 | 1989-06-16 | ||
| FR8908052A FR2648632B1 (en) | 1989-06-16 | 1989-06-16 | LOW SIZE SINGLE PHASE ELECTROMAGNETIC ACTUATOR |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1048957A true CN1048957A (en) | 1991-01-30 |
Family
ID=9382836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90106663.XA Pending CN1048957A (en) | 1989-06-16 | 1990-06-16 | The electromagnetic monophase actuator of miniaturization |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5298825A (en) |
| EP (1) | EP0429625B1 (en) |
| JP (2) | JPH07118898B2 (en) |
| CN (1) | CN1048957A (en) |
| DE (1) | DE69022175T2 (en) |
| ES (1) | ES2079477T3 (en) |
| FR (1) | FR2648632B1 (en) |
| WO (1) | WO1990016107A1 (en) |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5512871A (en) * | 1990-12-17 | 1996-04-30 | Moving Magnet Technologies S.A. | Rotatable single-phase electromagnetic actuator |
| FR2688105B1 (en) * | 1992-02-28 | 1994-05-06 | Moving Magnet Technologies Sa | ELECTROMAGNETIC ROTARY ACTUATOR SINGLE-PHASE RACE BETWEEN 60 AND 120 DEGREES. |
| FR2690793B1 (en) * | 1992-05-04 | 1995-12-08 | Moving Magnet Tech | ELECTROMAGNETIC ACTUATOR WITH TWO MOVABLE PARTS OPPOSING PHASES. |
| FR2691534B1 (en) * | 1992-05-19 | 1994-08-26 | Moving Magnet Tech | Permanent magnet position sensor and hall sensor. |
| DE4221272C2 (en) * | 1992-06-26 | 1995-01-26 | Mannesmann Ag | Actuator for assemblies in office equipment |
| US5519270A (en) * | 1992-08-19 | 1996-05-21 | Fujitsu Limited | Spindle motor and disk drive having the same |
| FR2705510B1 (en) * | 1993-05-19 | 1995-07-13 | Moving Magnet Tech | Short-stroke single-phase electromagnetic actuator with good force-to-power ratio. |
| FR2717947B1 (en) * | 1994-03-25 | 1996-05-31 | Sagem | Rotary electromagnetic actuator with limited angular travel. |
| US5528436A (en) * | 1994-06-03 | 1996-06-18 | Hewlett-Packard Company | Low profile motor powered disk assembly for a recording/reproducing device |
| JPH08242572A (en) * | 1995-02-28 | 1996-09-17 | Japan Servo Co Ltd | Three-phase permanent magnet type rotary electric machine |
| US5742450A (en) * | 1995-03-08 | 1998-04-21 | International Business Machines Corporation | Disk drive spindle motor with radial gap and field generating coils interconnected by ring flux guide |
| FR2733859B1 (en) * | 1995-05-04 | 1997-08-14 | Oudet Claude | ECONOMICAL STEP OR SYNCHRONOUS MOTOR |
| FR2734963B1 (en) * | 1995-05-31 | 1997-08-01 | Sonceboz Sa | ELECTROMAGNETIC ACTUATOR HAVING AT LEAST TWO STABLE POSITIONS BY MAGNETIC LOCKING |
| US5633545A (en) * | 1995-12-06 | 1997-05-27 | International Business Machines Corporation | Disk drive in-hub radial-gap spindle motor with coils generating axial fields |
| FR2764748B1 (en) * | 1997-06-13 | 1999-10-01 | Claude Oudet | ELECTROMAGNETIC DRIVE DEVICE WITH MOBILE PERMANENT MAGNET |
| US5828151A (en) * | 1997-08-27 | 1998-10-27 | Cts Corporation | Self aligning actuator with low bearing wear |
| US6198182B1 (en) * | 1998-09-02 | 2001-03-06 | Cts Corporation | Two-phase stepper motor having two disk stators with salient poles positioned on either side of two disk rotors |
| US5982058A (en) * | 1998-09-02 | 1999-11-09 | Cts Corporation | Two-phase stepper motor |
| JP3790214B2 (en) * | 2002-12-17 | 2006-06-28 | 株式会社 アサバ | Coreless motor |
| US6914351B2 (en) * | 2003-07-02 | 2005-07-05 | Tiax Llc | Linear electrical machine for electric power generation or motive drive |
| US6935476B2 (en) * | 2004-02-02 | 2005-08-30 | Borgwarner, Inc. | Clutch having a multiple pole electromagnetic actuator for transfer cases and the like |
| US7116210B2 (en) * | 2004-05-05 | 2006-10-03 | Cts Corporation | Actuator with integral position sensor |
| JP4533024B2 (en) * | 2004-07-06 | 2010-08-25 | キヤノン株式会社 | Driving device and light amount adjusting device |
| US20070008063A1 (en) * | 2004-08-13 | 2007-01-11 | Cts Corporation | Rotary actuator with non-contacting position sensor |
| WO2007061920A2 (en) * | 2005-11-17 | 2007-05-31 | Tiax Llc | Linear electrical machine for electric power generation or motive drive |
| KR20110121706A (en) | 2009-02-17 | 2011-11-08 | 시티에스 코포레이션 | Rotary position sensor |
| US8872395B2 (en) * | 2009-11-04 | 2014-10-28 | Fraen Mechatronics, Llc | Rotary single-phase electromagnetic actuator |
| JP5550017B2 (en) * | 2010-06-07 | 2014-07-16 | 日本電産サーボ株式会社 | Rotary actuator and electronic locking / unlocking device using the same |
| US8503104B2 (en) | 2010-09-10 | 2013-08-06 | Canon Kabushiki Kaisha | Motor having small size and high output, and light amount adjustment device equipped with the motor |
| FR3011697A1 (en) | 2013-10-07 | 2015-04-10 | Moving Magnet Tech | ELECTRICAL MACHINE WITHOUT ENCLOSURES WITH CONCENTRATED WINDING |
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-
1989
- 1989-06-16 FR FR8908052A patent/FR2648632B1/en not_active Expired - Fee Related
-
1990
- 1990-06-15 WO PCT/FR1990/000436 patent/WO1990016107A1/en active IP Right Grant
- 1990-06-15 DE DE69022175T patent/DE69022175T2/en not_active Expired - Lifetime
- 1990-06-15 EP EP90909752A patent/EP0429625B1/en not_active Expired - Lifetime
- 1990-06-15 ES ES90909752T patent/ES2079477T3/en not_active Expired - Lifetime
- 1990-06-15 JP JP2509045A patent/JPH07118898B2/en not_active Expired - Fee Related
- 1990-06-15 US US07/651,348 patent/US5298825A/en not_active Expired - Lifetime
- 1990-06-16 CN CN90106663.XA patent/CN1048957A/en active Pending
-
1999
- 1999-06-25 JP JP18080399A patent/JP3369512B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE69022175D1 (en) | 1995-10-12 |
| DE69022175T2 (en) | 1996-06-05 |
| US5298825A (en) | 1994-03-29 |
| EP0429625B1 (en) | 1995-09-06 |
| WO1990016107A1 (en) | 1990-12-27 |
| EP0429625A1 (en) | 1991-06-05 |
| FR2648632B1 (en) | 1991-10-04 |
| JP2000032721A (en) | 2000-01-28 |
| ES2079477T3 (en) | 1996-01-16 |
| JPH04503299A (en) | 1992-06-11 |
| JP3369512B2 (en) | 2003-01-20 |
| JPH07118898B2 (en) | 1995-12-18 |
| FR2648632A1 (en) | 1990-12-21 |
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